Method of forming diamond tools



Jan, 4, 1938. R H. TAYLOR 2,104,708

METHOD OF FORMING DIAMOND TOOLS Filed Dec. 14, 1956 Fig.2.

1 I l6 1; Z3

23 i ventor, (an

Rutherford H. Taylor,

y At

homey Patented Jan. 4, 1938 UNITED STATES A alums mn'riron or roams nrAMoNn TOOLS Rutherford B. Taylor, Millbnrn, N. 1., assimito LK. Smite.- sonalneuNewYor-k, N.Y.,a corporation of New York Application December 14, ms, Serial No. 115,135

1 (ilaim. (01. 10-101) The object of this invention is to provide a diamond tool in which small diamonds are effectively utilized by reason of substantially uniform distribution and suitable placement throughout the setting whereby always approximately the same number will be exposed at the cutting face and in service throughout the life of the tool. A further object is to insure to eachndiamond its individual setting out of contact with any other diamond so that the wearing away or loosening of any diamond will not thereby loosen any other diamond. A further object is to so place each diamond in the setting that the exposed part will 18 be in an advantageous position for cutting service.

In the accompanying sheet of drawings which forms a part of this description,

Figure 1 is a front elevation of a tool for electric ally heating and softening a diamond setting and compressing it around the diamonds. Fig. 2 is a side elevation and section of the tool on the line 11-11 of Fig. 1. Fig. 3 is a top view of a composite setting on the line m-m of Fig. 4, with several of the disks removed. Fig. 4 is a section through the axis of the same on the line IV-IV of Fig. 3.

The setting is composite, in other words it is made of, several pieces so that small diamonds may be inserted separated from one another and in substantially uniform distribution throughout the setting. Disks 30 of a hard alloy, as for example a nickel-copper alloy or a copper-siliconmanganese alloy which will become soft when heated before melting and becoming fluid, have holes drilled through them, the disks being of a thickness and the holes being of a diameter which will make the cells just suilicient to hold diamonds of the size that it is intended to use. These are stacked in a carbon crucible I4.

Each disk after it has been put into the crucible has its holes filled with diamonds, and the disksare placed on one another so that the holes will not be opposite and the diamonds in any disk will not contact with those in the disk beneath. The middle holes in the disks are located eccentric to the centers of the disks'so that the disks can be stacked in such manner that these holes will not coincide. Ablauk disk Si is at each end of the stack.

The crucible is clamped between electrodes IS. The electrodes are supported and guided in vcement bearings l8 and pressed against the sides of the crucible by screws ll. Current is brought to the electrodes from bus bars It which are connected through copper braids 20 on the electrodes. Thecrucible is supported on a compound slide 2| adjustable by screws 22 by which it is centered under a carbon ram 23 which is brought down against the top of the setting by means of a sliding rod 24 which is operated by a lever 25.

After the setting has been heated and rendered Jr plastic and compressed around the diamonds and has cooled it is taken from the crucible and the metal is cut away at one end, preferably the bottom end, and in any suitable manner as by sand blasting to partially expose the bottom layer of diamonds as the diamonds when uncovered from this end are mostly found to lie in a better position for use.

RUTHERFORD B. TAYLOR. 

